Question

1/3x^2-5=7 what is x

Answer 1

Answer:

x= 6

Step-by-step explanation:

$\frac{1}{3}x^{2}-5=7$

Add 5 to both sides

$\frac{1}{3}x^{2}-5+5=7+5\\\\\frac{1}{3}x^{2}=12$

Multiply both sides by 3

$3*\frac{1}{3}x^{2}=12*3\\\\x^{2}=36$

x² = 6*6

Take square root,

√x² =√6*6

x = 6